Formation of Al-rich nanocrystalline ZSM-5 via chloride-mediated, abrupt, atypical amorphous-to-crystalline transformation

Vanessa B. Mortola, Adriana P. Ferreira, Joseph M. Fedeyko, Christopher Downing, Jose M C Bueno, Mayfair C. Kung, Harold H Kung

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The efficient hydrothermal synthesis of highly crystalline, nano ZSM-5 particles, rich in framework Al content (Si/Al = 25) and low in the degree of intergrowth, in a medium of unusually high NaCl concentration was followed by examining the solids formed with 29Si, 27Al, 13C MAS NMR, TEM, DRIFT, and XRD spectroscopies. ZSM-5, in the form of 60 nm primary crystallites present as 100-150 nm dispersed cubic clusters, were crystallized from an amorphous phase via an abrupt, solid state transformation within 15 min at 165 °C. A model of the crystallization process was proposed, different from the typical nucleation-crystal growth process, in which aluminosilicate oligomers of low connectivity was salted out as amorphous solid as a result of high NaCl concentration immediately upon mixing of the ingredients.

Original languageEnglish
Pages (from-to)7517-7525
Number of pages9
JournalJournal of Materials Chemistry
Volume20
Issue number35
DOIs
Publication statusPublished - Sep 21 2010

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Chlorides
Crystallization
Crystalline materials
Aluminosilicates
Hydrothermal synthesis
Crystallites
Oligomers
Crystal growth
Nucleation
Nuclear magnetic resonance
Spectroscopy
Transmission electron microscopy
aluminosilicate

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemistry(all)

Cite this

Formation of Al-rich nanocrystalline ZSM-5 via chloride-mediated, abrupt, atypical amorphous-to-crystalline transformation. / Mortola, Vanessa B.; Ferreira, Adriana P.; Fedeyko, Joseph M.; Downing, Christopher; Bueno, Jose M C; Kung, Mayfair C.; Kung, Harold H.

In: Journal of Materials Chemistry, Vol. 20, No. 35, 21.09.2010, p. 7517-7525.

Research output: Contribution to journalArticle

Mortola, Vanessa B. ; Ferreira, Adriana P. ; Fedeyko, Joseph M. ; Downing, Christopher ; Bueno, Jose M C ; Kung, Mayfair C. ; Kung, Harold H. / Formation of Al-rich nanocrystalline ZSM-5 via chloride-mediated, abrupt, atypical amorphous-to-crystalline transformation. In: Journal of Materials Chemistry. 2010 ; Vol. 20, No. 35. pp. 7517-7525.
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